Question

Construct a square $ABCD$, given it's one side = 4.5 cm.

Answer 1

Draw the base $AB=4.5cm$ using a ruler.
Construct right angles at both points $A$ and $B$ and draw vertical lines along it.
Using compass, mark an arc of length $4.5cm$ on both the vertical lines from points
$A$ and $B$ respectively.
Mark the points as $D$ and $C$ respectively.
Join $ABCD$ which is the required square.